I fingered my girlfriend on her ovulation date. Is it possible that I had sperm under my nails?

HELLO I ADM FREAKING OUT I NEED HELP. ME AND MY GF DECIDED TO MAKE OUT, BEFORE MEETING HER I MASTURBATED. THEN I MET HER APPROXIMATELY AFTER 3 HOURS. BEFORE DOING ANYTHING I TOUCHED MY PENIS TO CHECK IF THERE IS PRECUM AND IT WAS THERE I IMMEDIATELY WASHED MY HANDS WITH SOAP AND THEN FINGERED HER AFTER 15 MINUTES.IT WAS HER OVULATING DATE.  I AM AFRAID THAT WAS THERE PRECUM UNDER MY NAILS? AND CAN SPERMS STAY ALIVE 15 MINUTES UNDER THE NAILS AND IS THERE ANY CHANCE OF PREGNANCY? PLEASE HELP ME